Group size estimator

How many trainers do I need to invite?

The Estimator is already "trainers of this attacker needed to finish inside the timer", so this page does not invent a number: it reads it off the boss's own ranked counter list for three realistic parties and re-simulates each of them at every level from 20 to 50.

Raid bossTierIVsWeatherFriendshipDodgingShadow attackersMega attackersLegendary attackers

Invite 2 to be safe — 2 if everyone is prepared

At level 40, a party of Frillish's top six counters needs 1.37 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.65 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 6:18. No level in this range makes it soloable with a prepared party. A duo works from level 20.

Frillish · Tier 5

waterghost

Weak to

ghostgrasselectricdark

Boss CP: 19,434
Boss HP: 15,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Frillish at each attacker level
Attacker level	Six of the best counter	A prepared party	A mixed local group	Prepared solo time	Faints per timer
Level 20	2(1.82)	2(1.97)	3(2.32)	9:03	6.0
Level 25	2(1.48)	2(1.69)	3(2.02)	7:47	6.0
Level 30	2(1.32)	2(1.49)	2(1.79)	6:52	6.0
Level 35	2(1.28)	2(1.43)	2(1.71)	6:36	6.0
Level 40	2(1.21)	2(1.37)	2(1.65)	6:18	5.9
Level 45	2(1.13)	2(1.31)	2(1.58)	6:02	5.9
Level 50	2(1.08)	2(1.26)	2(1.53)	5:49	5.8

Whole trainers in bold, the raw estimator in brackets — 2.04 means two trainers is right on the line and three is comfortable.

Six of the best counter

Every trainer brings six copies of the single best counter — the theoretical floor.

2 trainers at level 40

Necrozma (Dawn Wings)1.21

A prepared party

Each trainer brings the boss's top six counters, powered up and correctly TM'd.

2 trainers at level 40

Necrozma (Dawn Wings)1.21
Regieleki1.33
Kartana1.40
Zeraora1.40
Thundurus (Therian)1.43
Xurkitree1.44

A mixed local group

Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.

2 trainers at level 40

Hydreigon1.62
Absol1.63
Zarude1.63
Tyranitar1.62
Hisuian Zoroark1.64
Rillaboom1.63

The party these numbers assume

1. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

2. Regieleki

Thunder Shock + Thunder Cage

3. Kartana

Razor Leaf + Leaf Blade

4. Zeraora

Volt Switch + Plasma Fists

5. Thundurus (Therian)

Volt Switch + Wildbolt Storm

6. Xurkitree

Thunder Shock + Discharge

See the full ranked counter list for Frillish · check a real lobby (win chance, who brings what) · make a share card of the top six

How this is worked out

The boss is ranked once at level 40 with rankCached (the same memoised call /raids makes), then the three bands — rank 1, ranks 1-6, ranks 13-24 — are re-simulated at each attacker level with an 8-run Monte Carlo each. Holding the party fixed and moving only its level is deliberate: it answers "what if my party were level 20" rather than "what would a level-20 player's completely different party be", and it is about ten times cheaper than re-ranking every attacker seven times. The Estimator itself is Pokebattler's definition, time to win including rejoin time divided by the raid timer.